Rotary pump



May

s'. L. MENGE ROTARY PUMP Filed Sept. 4. 1926 2 Sheets-Sheet 2 INVENTORK A TTORN E YS.

Patented May 24-, 1927.

UNITED .sr

SIDNEYLAWRE CE MERGE, or NEW, ORLEANS; LOUISIANA.

- ROTARY I'UMP.

Application fil ed September 'The present invention relates to improvements in pumps, and has for an ob ect to provide'certain improvements over the invention shown and described in my prior U. S. Patent No. 950,398, granted Feb. 22,

An object of the presentinvention is to so modify the construction as shown in the above prior patent as to permit the device to be set at a higher elevation in the body of water than was heretofore possible and to so reconstruct the device as to reduce the entrance velocity of the water to the pump chamber, and thus decrease entrance losses.

Another object of the invention is to secure the above improvements in a simple and compact arrangement that may be in the nature of an accessory, subject to being installed upon existing constructions according to the prior patent.

Vith the foregoing and other objects in View, the invention will be more fully described hereinafter, and will be more particularly pointed out in the claim appended hereto. r

In the drawings, wherein like symbols refer to like or corresponding parts throughout the several views:

Figure 1 is a vertical section through an improved rotary pump device constructed according to the present invention Figure 2 is a perspective view with parts broken away, showing one of the corners of the pump box;

Figure 3 is a top plan view of the pump apparatus; and

Figure l '3 a horizontal section taken on the line 44lin Figure 1.

Referring more particularly to the drawings, the device consists in a construction substantially according to the above mentioned prior patent, and similar parts have been indicated by the same reference characters.

Power is received as by belt to the pulley wheel W upon the vertical shaft E extending through the pump box made up of the corner posts A and the planking B. The pump wheel is indicated at S and is mounted upon a shaft E between the partitions N and Q, having the openings P and R concentric with said pump wheel. The bottom of the device is indicated at G and the chamber between this pump C and the partition Q is adapted to receive water through the slots T in side walls. A beam L in this lower 4, 1926. Serial ,No. 133,690.

chamber receives the step vK for the lower end of the shaft E. i

As shown more particularly in Fig. 4, the chamber between the upper partition N and the solid partition M is cruciform, providmg an opening at each side for the water to the space above the pump chamber. At each corner of this cruciform chamber is vertical passage shut in by the partitions O for the flow of. water upward from the wheel and at the bottom of each passage is a deflector V, which consists of the two boards 1 and 2 set at an angle, as shown in Fig. 2. These deflectors V serve to direct the water up into the vertical passage at the four corners of the pump box and the water so deflected rises above the partition M into the upper portion of the pump box, where it overflows from the trough D.

According to the invention, water boxes or pipes 5 are shown as coupled to the mouths of the cruciform passages. water boxes or pipes forming water passages orinlets, are smaller, at least in vertical dimension, at the ends which couple to the cruciform inlets and are wider at their outer ends. Such water inlet boxes are curved downwardly from the cruciform passages and have their open months 6 directed down ward-and at a lower elevation than such cruciform chamber, whereby to admit water from a lower level into said cruciform chamber and subsequently into the pump chamber. This enables the pump to be set at a higher elevation in the body of water than would be possible if these passages.

were omitted. The lower receiving ends of these passages are wider or of greater broad area than the parts thereof which connect with the cruciform chamber. In other words, these water boxes are made with bell inlets to reduce the entrance velocity and thus decrease entrance losses. Each box or passage 5 may be made as a unit and an accessory to be attached to the existing form of pump apparatus according to the prior patent. The ends of the water boxes may be fitted to the sides of the pump body and secured thereto as by the angle strips 7 or other appropriate means. The lower ends 6 of the water boxes may be supported by bracket arms 8 projecting out from the side of the pump body. These arms or brackets 8 may be connected to the pump body or simply rest thereagainst. In this manner the water box may be readilydetached for cleaning, removal, repair and replacement.

The bell ends of the water boxes, while decreasing the inlet losses, correspomling1 increase the efficiency of the pump suction passages leading from the top of the wheel to a lower elevation than the wheel, thus enabling the pump to be set with less submergence than would be po ible otherwise. It these passages were omitted, the wheel would have to be totally sul'nnerged to prevent admission of air to the wheel.

It will be obvious that many changes in the construction, combinathm and arrangement of parts could be made, which could be used without departing from the spirit of my invention, and I do not mean to limit the invention to such details, except as particularly pointed out in the claim.

Having thus described my invention, What I claim and desire to secure by Letters Patent of the United States is:

A rotary pump comprising a pump box, a pump chamber therebcneath and in communication with the pump box, a pump 11! said pump chamber, inlet. chambers For the water above and below said pump chamber and communicating therewith said upper inlet chamber being cruciform and water inlet boxes forming units and coupled detachabl at the side-t 01 said pump box, said water boxes having small ends cmmcclillg with the ends of said crucii'm-m chamber and having wider bell ends extending downwardly at a lower level than said pump. and arms extending from the pump box to said Wider bell endsv SIDNEY LAXVRENCE MEI GE. 

